Post Offices List in Hilton Head Island City, South Carolina:
| Fairfield Post Office | 213 William Hilton Pkwy, Hilton Head Island, SC 29926 |
| Harbourtown Post Office | 71 Lighthouse Rd Ste 1, Hilton Head Island, SC 29928 |
| Hilton Head Island Post Office | 10 Bow Cir, Hilton Head Island, SC 29928 |